regarding the firmware rooting of > 1480 is possible. My Samsung UE58J5250 runs at version 1149 (the last upgrade was maybe February or May).
Hopefully, I can root my device, donate some money isn't a problem for me.

Firmware-version: 1149
Model: Samsung UE58J5250

Is rooting on my device possible?
maybe I have to downgrade my firmware via USB-stick or over rs232?
And why is my firmware version so old? (maybe a discounted product?)

I do NOT support "latest fw" at ALL. If you have one you should block updates on router and wait for it to STOP being "latest":)If you want me to help you please paste FULL log(s) to "spoiler"/"code" bbcodes or provide link(s) to pasted file(s) on http://ctrlv.it/ Otherwise "NO HELP"!!!If you want root DISABLE internet access to your device!!!!DO NOT EVER INSTALL FIRMWARE UPGRADE !!!!

Your fw version is 1125, now check release date If old enough it should be rootable

I do NOT support "latest fw" at ALL. If you have one you should block updates on router and wait for it to STOP being "latest":)If you want me to help you please paste FULL log(s) to "spoiler"/"code" bbcodes or provide link(s) to pasted file(s) on http://ctrlv.it/ Otherwise "NO HELP"!!!If you want root DISABLE internet access to your device!!!!DO NOT EVER INSTALL FIRMWARE UPGRADE !!!!

You should check what you get when you run J root Might simply work but yeah looks it's possible rootable

I do NOT support "latest fw" at ALL. If you have one you should block updates on router and wait for it to STOP being "latest":)If you want me to help you please paste FULL log(s) to "spoiler"/"code" bbcodes or provide link(s) to pasted file(s) on http://ctrlv.it/ Otherwise "NO HELP"!!!If you want root DISABLE internet access to your device!!!!DO NOT EVER INSTALL FIRMWARE UPGRADE !!!!